Irrigation第 5 / 100 题
A reduced pressure principle (RP) backflow assembly is primarily used to protect a potable water supply against what?
a.Low water pressure only
b.Both backsiphonage and backpressure, including high-hazard contamination
c.Freezing temperatures
d.Excess flow velocity
解析
An RP assembly is the highest level of mechanical backflow protection and guards against both backsiphonage and backpressure, making it suitable for high-hazard cross-connections. Irrigation systems using fertilizer or chemical injection are considered high hazard and typically require an RP device. It uses two check valves and a relief valve between them.
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